Insider Transactions Reported by 23 Insiders of NORTHWESTERN CORP

Location: Sioux Falls, SD

Quick Takeaways

NORTHWESTERN CORP has 23 insiders with reported activity on this page.
No net insider buy/sell flow is currently reported for the last year.
Recent transaction rows are not currently available.

What Changed

No meaningful buy/sell imbalance is currently visible in the one-year window.
Activity will update as new Forms 3/4/5 are filed.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Source Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 18 May 2025.

Buys

Shares: 0

Insiders: 0

Sells

Shares: 0

Insiders: 0

Net

Shares: 0

Insiders: 0

Window (months)	Buy $	Sell $	Net $
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

NORTHWESTERN CORP executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Valuation	Report Date
Robert C. Rowe	CEO, Director	$11,995,509	Mixed	13 Dec 2022
Brian B. Bird	President and CEO	$8,375,103	Mixed	07 Mar 2023
Dana J. Dykhouse	Director	$2,433,975	Mixed	06 Jan 2023
H. Grahame Heather	General Counsel & VP	$1,854,044	Mixed	13 Dec 2022
Bobbi L. Schroeppel	VP HR, CC & Comm	$1,783,019	Mixed	07 Mar 2023
John D. Hines	VP - Supply & MT GA	$1,768,298	Mixed	07 Mar 2023
Pohl Curtis T.	VP - Asset Mgmt, Bus. Dvlpmt	$1,542,436	Mixed	07 Mar 2023
Linda G. Sullivan	Director	$1,270,359	Mixed	06 Jan 2023
Anthony Thomas Clark	Director	$1,178,806	Mixed	06 Jan 2023
Michael R. Cashell	Vice President - Transmission	$1,134,408	Mixed	07 Mar 2023
Crystal Dawn Lail	Chief Financial Officer	$929,954	Mixed	07 Mar 2023
Jeffrey W. Yingling	Director	$845,616	Mixed	02 Feb 2023
Mahvash Yazdi	Director	$755,001	Mixed	02 Feb 2023
Britt E. Ide	Director	$593,831	Filing P/S	16 May 2023
Jeanne Vold	Vice President of Technology	$548,788	Mixed	07 Mar 2023
Larson Kent T.	Director	$287,150	Mixed	06 Jan 2023
Jan Robert Horsfall	Director	$256,594	Mixed	06 Mar 2023
Sherina M. Edwards	Director	$166,155	Mixed	09 May 2023
Jason Merkel	VP - Distribution	$133,722	Mixed	07 Mar 2023
Shannon Heim	Vice President and GC	$78,005	Mixed	07 Mar 2023
Jeffrey B. Berzina	Controller	$67,330	Mixed	07 Mar 2023
Cynthia Fang	Vice President - Regulatory	$33,606	Mixed	07 Mar 2023
Bleau LaFave	VP Asset Mgmt & Bus Dvlpmt	$21,290	Mixed	16 Jun 2023

Top shareholders of NORTHWESTERN CORP (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Robert C. Rowe	3/4/5	CEO, Director	— class O/S missing	204,527	$11,995,509	—	13 Dec 2022	3/4/5
Brian B. Bird	3/4/5	President and CEO	— class O/S missing	142,798	$8,375,103	—	07 Mar 2023	3/4/5
Dana J. Dykhouse	3/4/5	Director	— class O/S missing	41,500	$2,433,975	—	06 Jan 2023	3/4/5
H. Grahame Heather	3/4/5	General Counsel & VP	— class O/S missing	31,612	$1,854,044	—	13 Dec 2022	3/4/5
Bobbi L. Schroeppel	3/4/5	VP HR, CC & Comm	— class O/S missing	30,401	$1,783,019	—	07 Mar 2023	3/4/5
John D. Hines	3/4/5	VP - Supply & MT GA	— class O/S missing	30,150	$1,768,298	—	07 Mar 2023	3/4/5
Pohl Curtis T.	3/4/5	VP - Asset Mgmt, Bus. Dvlpmt	— class O/S missing	26,299	$1,542,436	—	07 Mar 2023	3/4/5
Linda G. Sullivan	3/4/5	Director	— class O/S missing	21,660	$1,270,359	—	06 Jan 2023	3/4/5
Anthony Thomas Clark	3/4/5	Director	— class O/S missing	20,099	$1,178,806	—	06 Jan 2023	3/4/5
Michael R. Cashell	3/4/5	Vice President - Transmission	— class O/S missing	19,342	$1,134,408	—	07 Mar 2023	3/4/5
Crystal Dawn Lail	3/4/5	Chief Financial Officer	— class O/S missing	15,856	$929,954	—	07 Mar 2023	3/4/5
Jeffrey W. Yingling	3/4/5	Director	— class O/S missing	14,418	$845,616	—	02 Feb 2023	3/4/5
Mahvash Yazdi	3/4/5	Director	— class O/S missing	12,873	$755,001	—	02 Feb 2023	3/4/5
Britt E. Ide	3/4/5	Director	— class O/S missing	10,125	$593,831	—	16 May 2023	3/4/5
Jeanne Vold	3/4/5	Vice President of Technology	— class O/S missing	9,357	$548,788	—	07 Mar 2023	3/4/5
Larson Kent T.	3/4/5	Director	— class O/S missing	4,896	$287,150	—	06 Jan 2023	3/4/5
Jan Robert Horsfall	3/4/5	Director	— class O/S missing	4,375	$256,594	—	06 Mar 2023	3/4/5
Sherina M. Edwards	3/4/5	Director	— class O/S missing	2,833	$166,155	—	09 May 2023	3/4/5
Jason Merkel	3/4/5	VP - Distribution	— class O/S missing	2,280	$133,722	—	07 Mar 2023	3/4/5
Shannon Heim	3/4/5	Vice President and GC	— class O/S missing	1,330	$78,005	—	07 Mar 2023	3/4/5
Jeffrey B. Berzina	3/4/5	Controller	— class O/S missing	1,148	$67,330	—	07 Mar 2023	3/4/5
Cynthia Fang	3/4/5	Vice President - Regulatory	— class O/S missing	573	$33,606	—	07 Mar 2023	3/4/5
Bleau LaFave	3/4/5	VP Asset Mgmt & Bus Dvlpmt	— class O/S missing	363	$21,290	—	16 Jun 2023	3/4/5

Recent Insider Transactions by Companies or Individuals for NORTHWESTERN CORP

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
No insider transactions were found in the last 12 months for this issuer.

* An asterisk sign (*) next to the price indicates that the price is likely invalid.